mitchell



L. H. MITCHELL.

FINISHING TOOL.

APPLICATION FILED SEPT. I6. 1914.

Patented Aug. 1, 1916.

2 SHEETS-SHEET I.

Wbbmzooeo L. H. MITCHELL.

FINISHING TOOL.

APPLICATION FILED SEPT. 6. 1914.

l.,193,407. Patented Aug. 1, 1916.

2 SHEETS-SHEET 2- /ZZ 0 iiLmw,

g'noamtoz lJZMIZC/wa LVN mamas 252M a M LEQNARD H. MITGEIELL, F OAKDALE, GALIFOENIA, ASSIGNQR 0F ONE-HALF TE) ZUE G. PECK, SR, 015' TUMRIE, CALIFORNIA.

FIEl'ISHINfit-TOOL.

manner.

application filed September 16, 191%.

7 To all whom it may concern:

Be it known that l, LEONARD H. MIT ELL, a citizen of the United States residing at Dakdale, in the county of Stanislaus and State of California, have invented new and useful improvements in Finishing-Tools, of which the following is a specification.

This invention relates to improvements in finishing machines and has particular application to a motor driven finishing machine whereby floors and other surfaces may be scraped, cleaned, polished, placed and otherwise acted upon.

in carrying out the present invention, it is my purpose to improve and simplify the general construction of motor operated machines of this class and to provide a machine wherein the finishing tool may be moved toward and away from the surface being acted upon so that the pressure of such elements upon the floor maybe varied.

it is also my purpose to provide a machine'of the class described whereby hand carried tools may be operated so that vertical and other walls may be treated.

With the above and other objects in View, the invention consists in the construction, combination and arrangement of parts hereinafter set forth in and fallingwithin the scope of the claim.

In the accompanying drawingal igure l is a view in side elevation of a finishing machine constructed in accordance with the present invention. Fig. 2 is a view in end elevation thereof. Fig. 3 isa vertical sectional view through the bearings supporting the tool carrying shaft. Fig. 4 is a top plan view of the disk carrying the finishing substance. Fig. 5 is a cross sectional view through such disk.

Referring now to the drawings in detail, 1 designates a wheeled frame comprising longitudinal side bars 2, 2 spaced apart in parallelism and interconnected through the medium of end bars 3, 3 and longitudinal side bars l, 4 interconnected through the medium of end bars 5, 5 and disposed above the first-mentioned bars and spaced apart therefrom and vertical legs 6 secured to the corners of the rectangular frames formed by the sets of bars 2, 3 and4, 5, the lower extremities of the leg 6 being provided with casters 7 whereby the supporting frame formed by the bars 2. 3, 4, 5 and the leg 6 may be readily transported from one place Specification of Letters, Patent.

Patented. ne a, rare.

Serial No. 882,070.

to another. The lower rectangular frame formed by the bars 2 and 3 is provided with a platform 8 and mounted upon the platform 8 is a driving motor 9, which,'in this instance, is of the electrically actuated type.

Resting upon the end bars 5, 5 and suitably secured thereto and extending longitudinally of the frame is a rod 10 having one extremity thereof projecting beyond the ad acent'end of the frame, while resting upon the end bars 3 and suitably secured thereto and arranged longitudinally of the frame is a rod 11 disposed below the rod 10 and having the end thereof corresponding with the projecting end of the rod 10 projected beyond the adjacent end portion of the frame 1. The projecting-ends of the rods 10 and 11 are provided with vertically aliningbearings i2, 13 respectively and rotatably mounted within these alining bearings is a vertical shaft 14: having a belt pulshaft of the motor 9 is a driving belt 17 whereby the shaft 14 is rotated in the operation of the motor 9. The shaft 14: is capable of vertical adjustment within the bearings 12 and 13 and in order to hold the shaft in the desired adjusted position the bearing 13 is provided with suitable holding means. This holding means preferably coinprises a collar fixed to the shaft 1% immediately above the bearing 13 and formed with an annular groove 26 in which are mounted the legs of a yoke 27 carried by a vertically adjustable member 28 mounted upon the adjacent portion of the rod 11 and passed through the vertically adjustable member 28 is a vertical adjusting screw 29 having a nut 30 threaded thereon below the adjacent portion of the member 28; a spring 31 surrounding the screw 29 between the upper headed end thereof and the upper portion of the member 28. By turning the nut 30 on the adjusting screw 29 the memberQS-Carrying the yoke 27 may be elevated and lowered to impart a corresponding mo tion' to the shaft 14, the spring 31 cooperating with the nut to hold the shaft in position. 1

18 designates a circular finishing disk having the upper face thereof formed with a central disposed socket 19 designed to receive the lower extremity of the shaft it whereby the disk may be fixed to the shaft lid the

to revolve therewith. Formed on" the periphery of the disk and extending upwardly therefrom is an annular flange .20 while mounted on the upper surface of the disk and extending radially'thereof are adjusting bars 21 having the outer extremities thereof equipped with segmental shoes 22 disposed adjacent to the inner surface of the flange 20 and cooperating therewith to grip the marginal edge of theemery paper,

sand paper orother material applied to the lower face of the .disk, the barsEZl being capable of radial adjustment and provided with set screws working through slots in the disk 18 whereby the-bars may be held in the desired adjusted position. If desired, a flexible shaft 23 may have one endthereof detachably connected with the upper end of the vertical shaft 14 and the opposite end equipped with a disk 24: similar in construction to the disk 18 and designed to carry sand paper, emery paper or other polishing material whereby walls, ceilings and the like may be finished ofi. I

From the foregoing description taken in connection with the accompanying drawings, the construction, mode of operation and manner of employing my invention will be readily apparent. It will be seen that I have provided a finishing machine which meager may be readily transported from place to place and whereby the pressure of the finishing tool on the surface being acted'upon maybe varied at will. Furthermore, it will be noted that the strain on the longitudinally extending bars is distributed evenly and uniformity over the entire structure owing-to the motor andthe driving connections between the motorand the shaft being disposed between such bars.

A. machine of the class described comprising a frame, a vertical shaft journaled in said frame and capalle of rotation and hav-- 

